I was wondering if the WR450 guys have anything in the manual that talks about testing compression? I put the '03 YZ cam in eons ago, and am very happy with it. I have recently experienced starting problems, so I went in and found an intake valve out of specs. Waiting on the correct shim, but if that does not solve my starting problem, I am thinking my compression may be down. I have approx. 10,000 miles on my '98, so a freshening up of the top end is probably due. Any thoughts about how to test compression with the auto-decompression cam? Thanks!